Drag Racing 1/4 Mile Calculator
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I have found this calculator to be accurate on my car, a few others I have plugged in seem to be quite close too
As it is based on an Auto trans car, the ET needs adjusted for manual boxes (time lost gear shifting) I have found that you need to add 8% to the ET for a syncro box and 5% for a dog box.
http://www.turbofast.com.au/drag.html
Andy
As it is based on an Auto trans car, the ET needs adjusted for manual boxes (time lost gear shifting) I have found that you need to add 8% to the ET for a syncro box and 5% for a dog box.
http://www.turbofast.com.au/drag.html
Andy
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Using flywheel hp. I find the +8% ET works ok with my shabby slow (save the box) gear shifts, maybe try only +6% if you are really slicing it through the box ?
What weight is your car in race trim ? How did the MPH work out ? as that is closer related to power output and less disrupted by gear shift speed.
Andy
What weight is your car in race trim ? How did the MPH work out ? as that is closer related to power output and less disrupted by gear shift speed.
Andy
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Doesnt work too well with a rwd car though.
For mine, just asking for weight, and ET it estimates 348bhp, with a 12.54, and 3476lbs
Yet, when I ask for terminal speed, it estimates 470bhp for that to produce a terminal of 120mph, at 3476lbs.
I think its kind of assuming a perfect launch, with traction all the way, in an ideal world.
That doesnt really happen. Would work better for Subarus I guess.
For mine, just asking for weight, and ET it estimates 348bhp, with a 12.54, and 3476lbs
Yet, when I ask for terminal speed, it estimates 470bhp for that to produce a terminal of 120mph, at 3476lbs.
I think its kind of assuming a perfect launch, with traction all the way, in an ideal world.
That doesnt really happen. Would work better for Subarus I guess.
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See you at Crail Stevie
Here are a few cars that seem to tie up closely with this calculator.
Car................Mass/BHP........Calc ET/MPH....Actual ET/MPH
My bike eng kitcar..580/140...........12.8/112........12.9/113
P20SPD.............1320/360est?.......12.6/117........12.6/118
My Scoob(last yr)..1240/390..........12.0/121........11.8/119
My Scoob(this yr)..1240/440..........11.5/127........11.6/127
Keiths Skyline.....1400/800.............9.6/149..........9.9/152
My V8 kit car...... 820/430.............9.5/145..........9.4/144
Riggoli Scoob......1200/650.............9.2/147..........9.1/147
All pretty close using the +8% ET for manual cars So what can we expect at Scooby shootout
Mr X Scoob.........1320/500...........11.3/130
Mr Y Scoob.........1320/550...........10.9/134
Mr Z Scoob.........1320/600...........10.5/139
I can't wait
Andy
[Edited by Andy.F - 9/23/2003 8:27:47 PM]
[Edited by Andy.F - 9/23/2003 8:29:06 PM]
Here are a few cars that seem to tie up closely with this calculator.
Car................Mass/BHP........Calc ET/MPH....Actual ET/MPH
My bike eng kitcar..580/140...........12.8/112........12.9/113
P20SPD.............1320/360est?.......12.6/117........12.6/118
My Scoob(last yr)..1240/390..........12.0/121........11.8/119
My Scoob(this yr)..1240/440..........11.5/127........11.6/127
Keiths Skyline.....1400/800.............9.6/149..........9.9/152
My V8 kit car...... 820/430.............9.5/145..........9.4/144
Riggoli Scoob......1200/650.............9.2/147..........9.1/147
All pretty close using the +8% ET for manual cars So what can we expect at Scooby shootout
Mr X Scoob.........1320/500...........11.3/130
Mr Y Scoob.........1320/550...........10.9/134
Mr Z Scoob.........1320/600...........10.5/139
I can't wait
Andy
[Edited by Andy.F - 9/23/2003 8:27:47 PM]
[Edited by Andy.F - 9/23/2003 8:29:06 PM]
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